US1598967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of revivifying spent filtering materials
Assignee: STANLEY HILLER Inc
•
Filing: 1923-12-21
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Granted: 1926-09-07
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Expires: 1943-12-21
Abstract
No abstract record available.
Inventors
- 👤 Hiller Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:48
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12; B01J20/14; B01J20/30; B01J20/34; B01J20/3433; B01J20/345; B01J20/3458; B01J20/3483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1929-09-06 | 1930-03-08 | 1930-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-09-06 | 1934-03-08 | 1934-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-09-06 | 1938-03-08 | 1938-09-07 | $7700.00 | Window Closed / Lapsed |